Fix ppc64 single step over atomic sequence testcase.
The current ppc64 single step over atomic sequence testcase is written in C and breaks with some versions of gcc. Convert the test to assembly and use stepi to step through it. gdb/testsuite/ 2014-04-01 Anton Blanchard <anton@samba.org> * gdb.arch/ppc64-atomic-inst.c: Remove. * gdb.arch/ppc64-atomic-inst.S: New file. * gdb.arch/ppc64-atomic-inst.exp: Adapt for asm based testcase.
This commit is contained in:
Anton Blanchard
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11a865c84f
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62f7182c14
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@ -1,3 +1,9 @@
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2014-04-01 Anton Blanchard <anton@samba.org>
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* gdb.arch/ppc64-atomic-inst.c: Remove.
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* gdb.arch/ppc64-atomic-inst.S: New file.
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* gdb.arch/ppc64-atomic-inst.exp: Adapt for asm based testcase.
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2014-03-31 Doug Evans <dje@google.com>
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* gdb.base/print-symbol-loading-lib.c: New file.
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@ -0,0 +1,61 @@
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/* This file is part of GDB, the GNU debugger.
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Copyright 2008-2014 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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.align 2
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.globl main
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#if _CALL_ELF == 2
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.type main,@function
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main:
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#else
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.section ".opd","aw"
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.align 3
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main:
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.quad .main,.TOC.@tocbase,0
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.size main,.-main
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.previous
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.globl .main
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.type .main,@function
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.main:
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#endif
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li 0,0
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addi 4,1,-8
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stw 0,0(4)
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1: lwarx 5,0,4
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cmpwi 5,0
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bne 2f
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addi 5,5,1
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stwcx. 5,0,4
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bne 1b
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std 0,0(4)
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2: ldarx 5,0,4
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cmpdi 5,0
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bne 3f
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addi 5,5,1
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stdcx. 5,0,4
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bne 1b
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3: li 3,0
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blr
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#if _CALL_ELF == 2
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.size main,.-main
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#else
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.size .main,.-.main
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#endif
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@ -1,44 +0,0 @@
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/* This file is part of GDB, the GNU debugger.
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Copyright 2008-2014 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include <stdio.h>
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int main()
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{
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unsigned int word = 0;
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unsigned int *word_addr = &word;
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unsigned long dword = 0;
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unsigned long *dword_addr = &dword;
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__asm __volatile ("1: lwarx %0,0,%2\n" \
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" addi %0,%0,1\n" \
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" stwcx. %0,0,%2\n" \
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" bne- 1b" \
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: "=&b" (word), "=m" (*word_addr) \
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: "b" (word_addr), "m" (*word_addr) \
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: "cr0", "memory"); \
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__asm __volatile ("1: ldarx %0,0,%2\n" \
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" addi %0,%0,1\n" \
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" stdcx. %0,0,%2\n" \
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" bne- 1b" \
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: "=&b" (dword), "=m" (*dword_addr) \
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: "b" (dword_addr), "m" (*dword_addr) \
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: "cr0", "memory"); \
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return 0;
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}
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@ -27,7 +27,7 @@ if {![istarget "powerpc*"] || ![is_lp64_target]} {
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}
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set testfile "ppc64-atomic-inst"
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set srcfile ${testfile}.c
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set srcfile ${testfile}.S
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set binfile ${objdir}/${subdir}/${testfile}
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set compile_flags {debug quiet}
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@ -50,11 +50,18 @@ set bp1 [gdb_get_line_number "lwarx"]
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gdb_breakpoint "$bp1" "Breakpoint $decimal at $hex" \
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"Set the breakpoint at the start of the sequence"
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set bp2 [gdb_get_line_number "ldarx"]
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gdb_breakpoint "$bp2" "Breakpoint $decimal at $hex" \
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"Set the breakpoint at the start of the sequence"
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gdb_test continue "Continuing.*Breakpoint $decimal.*" \
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"Continue until breakpoint"
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gdb_test next ".*__asm __volatile.*" \
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gdb_test nexti "bne.*1b" \
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"Step through the lwarx/stwcx sequence"
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gdb_test next ".*return 0.*" \
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"Step through the ldarx/stdcx sequence"
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gdb_test continue "Continuing.*Breakpoint $decimal.*" \
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"Continue until breakpoint"
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gdb_test nexti "bne.*1b" \
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"Step through the lwarx/stwcx sequence"
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